Tthe units digit of the sum 1980 2 + 1981 2 + 1982 2 is

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Tthe units digit of the sum 1980²+ 1981²+ 1982^{2 is}

Guest Sep 23, 2015

CPhill · Answer 1 · 2015-09-23T04:02:30

The unit digits sum = 5

Guest · Answer 2 · 2015-09-23T04:09:46

CPhill: What is the kid asking? The sum of "1's" in that expression? Shouldn't it be 4?.